"This acid is prepared by distilling pure fluor spar (Calcium fluoride) in a state of fine powder with sulphuric acid. As the acid dissolves glass, the distillation must be performed in platinum vessels, and the acid can only be preserved
in bottles of the same, or in bottles made of gutta percha". --Amer. Hom. Pharm., 1882, p. 83.

Fluorine appears to be the predominant healing agent in the Missisquoi Springs. The real cures reported to have been made by the waters and clay correspond to the symptoms obtained by the provings, as well as to the clinical results obtained
since by the guidance of these symptoms.